共查询到20条相似文献,搜索用时 15 毫秒
1.
在服务质量差距分析模型的基础上,基于服务管理差距和服务质量差距测评体系,运用结构方程建模方法,建立了企业内部服务管理差距与顾客感知服务质量差距之间的关系路径图和关系模型,定量研究了四个服务管理差距对服务质量差距的影响关系、服务管理差距测评指标对相应的四个服务管理差距的影响关系,为顾客感知服务质量差距的测量和评价提供了技术和方法.结合某外语培训学校服务管理实际进行了案例研究,为企业服务质量的诊断和改进提供了科学依据. 相似文献
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In this paper, we summarize some facts on spline wavelets, analyze the Hilbert transform of these wavelets on the real line and on the unit circle, describe an algorithm for computing the Hilbert transform on uniform grids, and report on some test calculations. 相似文献
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V. V. Makeev 《Journal of Mathematical Sciences》2004,119(2):245-248
Two familiar unsolved geometric problems are discussed: on functions on the 2-sphere and on quadrangles inscribed in a smooth planar Jordan curve. A related question on equipartitioning a mass on a plane is also discussed. Bibliography: 6 titles. 相似文献
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中国邮递员问题50年 总被引:2,自引:0,他引:2
首先介绍一般邮递员问题, 涉及费用、服务侧、衔接费用、次序等要素. 然后简要综述过去50年来中国邮递员问题、有向图上中国邮递员问题、带风向的邮递员问题、混合图上邮递员问题以及乡村邮递员问题等一般邮递员问题的特殊情况的研究进展, 突出问题的线性规划描述及相应的组合多面体结构, 着重讨论问题的模型、精确算法及其时间复杂度、NP-困难情形下的近似算法及其性能比. 相似文献
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《Journal of Computational and Applied Mathematics》2012,236(5):801-811
In this paper, based on some mesh-dependent estimates on the extreme eigenvalues of a general finite element system defined on a simplicial mesh, novel and sharp bounds on the permissible time step size are derived for the mass lumping finite element approximations of parabolic equations. The bounds are dependent not only on the mesh size but also on the mesh shape. These results provide guidance to the stability of numerical solutions of parabolic problems in relation to the unstructured geometric meshing. Numerical experiments on both uniform meshes and adaptive meshes are presented to validate the theoretical analysis. 相似文献
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Compactness of composition operators on BMOA and VMOA 总被引:1,自引:0,他引:1
Hasi WULAN 《中国科学A辑(英文版)》2007,50(7):997-1004
We give a new and simple compactness condition for composition operators on BMOA,the space of all analytic functions of the bounded mean oscillation on the unit disk.Using our results one may immediately obtain that compactness of a composition operator on BMOA implies its compactness on the Bloch space as well as on the Hardy space.Similar results on VMOA are also given. 相似文献
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Asrifa Sultana 《Numerical Functional Analysis & Optimization》2017,38(8):1060-1068
In this paper, we obtain an existence theorem for fixed points of contractive set-valued mappings on a metric space endowed with a graph. This theorem unifies and extends several fixed point theorems for mappings on metric spaces and for mappings on metric spaces endowed with a graph. As an application, we obtain a theorem on the convergence of successive approximations for some linear operators on an arbitrary Banach space. This result yields the well-known Kelisky–Rivlin theorem on iterates of the Bernstein operators on C[0,1]. 相似文献
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In this paper, based on some mesh-dependent estimates on the extreme eigenvalues of a general finite element system defined on a simplicial mesh, novel and sharp bounds on the permissible time step size are derived for the mass lumping finite element approximations of parabolic equations. The bounds are dependent not only on the mesh size but also on the mesh shape. These results provide guidance to the stability of numerical solutions of parabolic problems in relation to the unstructured geometric meshing. Numerical experiments on both uniform meshes and adaptive meshes are presented to validate the theoretical analysis. 相似文献
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This contribution gives results on the action of the Laplace-Beltrami derivative on sufficiently smooth kernels on the sphere, those defined by absolutely and uniformly expansions generated by a family of at least continuous functions. Among other things, the results show that convenient Laplace-Beltrami derivatives of positive definite kernels on the sphere are positive definite too. We also include similar results on the action of the Laplace-Beltrami derivative on condensed spherical harmonic expansions. 相似文献
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D. Z. Kagan 《Journal of Mathematical Sciences》2008,149(3):1224-1229
The question on the existence of nontrivial pseudocharacters on anomalous products of locally indicable groups is considered.
Some generalizations of theorems of R. I. Grigorchuk and V. G. Bardakov on the existence of nontrivial pseudocharacters on
free products with the amalgamation subgroup are found. It is proved that they exist on an anomalous product 〈G, x | w = 1〉, where G is a locally indicable noncyclic group. We also prove some other propositions on the existence of nontrivial pseudocharacters
on anomalous products of groups. Results on the second cohomologies of these products and their nonamenability follow from
the propositions on the existence of nontrivial pseudocharacters on these groups.
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Translated from Fundamentalnaya i Prikladnaya Matematika, Vol. 12, No. 3, pp. 55–64, 2006. 相似文献
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平行机半在线排序问题研究(Ⅱ) 总被引:15,自引:1,他引:14
继续介绍半在线平行机排序问题的研究进展.主要介绍第二类、第三类半在线模型.研究两个(或两个以上)半在线模型间关系:复合与限制.文章最后给出了一些待研究的问题。 相似文献
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结构方程模型是当前研究顾客满意和顾客忠诚的主流方法之一,但基于结构方程对顾客满意和顾客忠诚进行市场细分方法的研究却十分缺乏.基于结构方程模型进行市场细分算法的应用研究,并对得出的细分结果进行了解释. 相似文献
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Man Chun Leung 《偏微分方程通讯》2013,38(3-4):367-417
This note contains considerations on the existence and non-existence problem of conformal scalar curvature equations on some complete manifolds. We impose two general types of conditions on complete manifolds. The first type is in terms of bounds on curvature and injectivity radius. The second type is in terms of some particular structures on ends of manifolds, for examples, manifolds with cones or cusps and conformally compact manifolds. We obtain non-existence results on both types of conditions. Then we study in more details the existence problem on manifolds with cones, manifolds with cusps and conformally flat manifolds of bounded positive scalar curvature. 相似文献
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Helmut H. Schaefer Xiao-Dong Zhang 《Proceedings of the American Mathematical Society》1997,125(1):93-99
We prove that a Baire measure (or a regular Borel measure) on a compact Hausdorff space is sequentially order continuous as a linear functional on the Banach space of all continuous functions if and only if it vanishes on meager Baire subsets, a result parallel to a much earlier theorem of Dixmier. We also give some results on the relation between sequentially order continuous measures on compact spaces and countably additive measures on Boolean algebras.
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We survey mainly recent results on the two most important orthogonality types in normed linear spaces, namely on Birkhoff orthogonality and on isosceles (or James) orthogonality. We lay special emphasis on their fundamental properties, on their differences and connections, and on geometric results and problems inspired by the respective theoretical framework. At the beginning we also present other interesting types of orthogonality. This survey can also be taken as an update of existing related representations. 相似文献
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《纯数学与应用数学通讯》2018,71(6):1074-1108
We generalize the classical Bochner formula for the heat flow on M to martingales on the path space PM and develop a formalism to compute evolution equations for martingales on path space. We see that our Bochner formula on PM is related to two‐sided bounds on Ricci curvature in much the same manner that the classical Bochner formula on M is related to lower bounds on Ricci curvature. Using this formalism, we obtain new characterizations of bounded Ricci curvature, new gradient estimates for martingales on path space, new Hessian estimates for martingales on path space, and streamlined proofs of the previous characterizations of bounded Ricci curvature.© 2018 Wiley Periodicals, Inc. 相似文献
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Vasile Brînzănescu 《Annali dell'Universita di Ferrara》2017,63(1):33-50
We survey some parts of the vast literature on holomorphic vector bundles on compact complex manifolds, focusing on the rank-two case vector bundles on non-Kähler elliptic fibrations. It is by no means intended to be a complete overview of this wide topic, but we rather focus on results obtained by the author and his collaborators. 相似文献